Messages in this thread Patch in this message | | | Date | Fri, 08 Jul 2011 15:50:18 -0700 | From | Greg KH <> | Subject | [29/35] bug.h: Add WARN_RATELIMIT |
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2.6.32-longterm review patch. If anyone has any objections, please let us know.
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From: Joe Perches <joe@perches.com>
[ Upstream commit b3eec79b0776e5340a3db75b34953977c7e5086e ]
Add a generic mechanism to ratelimit WARN(foo, fmt, ...) messages using a hidden per call site static struct ratelimit_state.
Also add an __WARN_RATELIMIT variant to be able to use a specific struct ratelimit_state.
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- include/asm-generic/bug.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
--- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -50,6 +50,22 @@ struct bug_entry { #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while(0) #endif +#define __WARN_RATELIMIT(condition, state, format...) \ +({ \ + int rtn = 0; \ + if (unlikely(__ratelimit(state))) \ + rtn = WARN(condition, format); \ + rtn; \ +}) + +#define WARN_RATELIMIT(condition, format...) \ +({ \ + static DEFINE_RATELIMIT_STATE(_rs, \ + DEFAULT_RATELIMIT_INTERVAL, \ + DEFAULT_RATELIMIT_BURST); \ + __WARN_RATELIMIT(condition, &_rs, format); \ +}) + /* * WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report * significant issues that need prompt attention if they should ever
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